[Asterisk-Users] anyone doing voice audio detect VAD on analog lines

[Steve Underwood]

Jerry Geis wrote:

> I am trying to use digium TDM04B type cards combined with call
> files like:
>
> Channel: Zap/1/5551212
> Context: smvoice-dialout
> Extension: 99999
> Application: Playback
> Data: demo-congrats
>
> To call out and play messages. My problem is as soon as the phone is 
> dialed
> the message demo-congrats starts playing even though the called person 
> has not
> answered the phone yet... This does not happen on a T1 as
> it has signalling indicating the call was answered...
>
> I am looking for a solution that does this in asterisk for analog lines.
>
> I used to use old dialogic D41PCI cards that had call progress analysis.

I used to use that too. Pity it never worked. :-)

>
> I have played with the /etc/asterisk/zapata.conf "callprogress=yes" 
> setting
> but have not had any luck. Also the comments say its HIGHLY EXPERIMENTAL.
>
> Has anyone found a good way to do this and can you share?

Nope. Not in the general case.

Steve